| 摘要 |
PROBLEM TO BE SOLVED: To prevent deterioration in voice quality at a reproducing time by detecting an attack position from a rhythm track voice source signal and performing the time base companding for the voice source signals of all tracks based on the attack position when the time base companding processing is performed for a multi-track voice source signal. SOLUTION: The input audio signals x(t) of the multi-track voice source signal are inputted to an attack detection part 1, and the attack position is detected here related to the rhythm track voice source signal among the inputted signals. The input audio signals x(t) are supplied to a time base companding processing apt 2 also, and the time base companding processing part 2 performs the time base companding processing for the signal between the attack positions detected in the attack detection part 1 of the input audio audio signals x(t). Thus, a voice quality change caused when the multi-track voice source signal is time base companded is prevented. |
